The bus is stranded, stuck fast in a snowdrift. The driver is missing along with a young girl. A half naked woman is left behind, handcuffed and freezing onboard. Who she is and where the girl has gone unravels into a web of sexual abuse, mental torture and deeply laid family rivalries, spanning from Istanbul to Glasgow. Newly appointed to the Major Crime and Terrorism Squad at Strathclyde Police, DI John J. Arbogast is tasked with tracking down a suspected paedophile as part of a national manhunt. Haunted by a failed case in the past he's determined to find the girl before it's too late. But as the case unravels to unveil an international sex trafficking ring it becomes clear that all is not what it seems.